METHOD TO MAKE A BARREL FOR AUTOMATED RIFFLE ARMS FOR A SHELL 5.56X45-MM

This invention relates to the area of ammunition. A method for making a barrel of automated riffle arms for the shell 5.56x45 mm NATO (.223 "REMINHTON"), in which one makes the billet for the barrel, drills the channel of the barrel, drills the cartridge-chamber, threads the rifling on the inner surface of the channel of the bar, and after having performed the technological operations on making riffles one performs chromium-plating of the inner surface of the channel of the barrel. After having performed the technological operations on making the riffle one drills reboring of the channel of the cartridge chamber for cylindrical form with diameter larger than the diameter of the bottom part of the shell, with pressing to cylindrical part of the cartridge chamber an insertion , with reboring the insertion at long axis and arranging a through channel in the insertion, as a cartridge chamber, corresponding in shape to the outer surface of the cartridge shell of caliber 5.56x45 mm NATO (.223 "REMINHTON"). Before chromium-plating of the barrel channel one performs technological operations on application of chemical coating to the inner surface of the channel arranged as a cartridge chamber in the insertion. This method provides possibility of use of the shells of standard NATO in the barrels of automated rifle arms of home production.